it is something biden made clear as he sat with xi after the meeting. call complex relationships for sustained a high-level engagement. that is why the president of united states asked you to be here. >> u.s. officials say behind closed doors biden laid out the obama administration's objections in detail and called on him to reduce the tensions. it is acial said territorial dispute in the region. he was going to hear biden out. what he decides to do it that remains an open question. shred ofng came with a positive news. it came from the chinese government. an offer to set up communication channels between china and japan. it would be a shift for the japanese who have refused to acknowledge the air defense zone's existence. what continues to suck the oxygen out of the broader economic agenda, both he and xi expressed the view that 2013 has been a positive year. biden, in his public remarks able toar that they are solidify the relationship and the possibilities are endless. the need for trust and the relationship is something from the foreign relations co